The function of DNAJC12 (DnaJ heat shock protein family (Hsp40) member C12, Ensembl gene identifier ENSG00000108176) is as follows. Probable co-chaperone that participates in the proper folding of biopterin-dependent aromatic amino acid hydroxylases, which include phenylalanine-4-hydroxylase (PAH), tyrosine 3-monooxygenase (TH) and peripheral and neuronal tryptophan hydroxylases (TPH1 and TPH2). .